I'd really like to have a solar dehydrator, to dehydrate various fruit, nuts and fungi that I forage. Ideally I'd like to document the design and building process, and post a summary with pictures over at <http://geekmeetsnature.wordpress.com">Geek Meets Nature</a>.
I already have a big square piece of double-glazed window; the rest of what I need would be wood for the casing, screens for the food to be dried and to keep bugs out, a dark background to increase heating, and so on. I might like to also attach a small solar-powered fan to the top to increase airflow and reduce drying time; something cobbled together out of 2xAA mini-fans and solar garden lights would work reasonably well I think.
There are several plans available on the internet. Ideally I'd like something fairly sturdy, that I can leave out in the rain without having to worry about it disintegrating - so no cardboard.
If we get into 'dreaming' territory, I'd like to also have a solar oven, using the same piece of double-glazing, and be able to switch between the two at will.
I figure if I were to get together with one or two other people, it would take a day for the planning to be done, possibly 2 or 3 good-weather days to scavenge enough material from skips etc (I can't carry anything heavy, so I would definitely need help with this!), and another 2 days or so to put the thing together.